Emergency: Passengers emerge from the superjumbo in Singapore. They are now being offered counselling
The plane was flying from London to Sydney via Singapore. Debris rained down on the Indonesian island of Batam
Fairfax Media in Australia quoted an anonymous Qantas pilot as saying that engines were routinely shut down on aircraft which fly around the world but 'it must have been quite a catastrophic failure if it blew parts off an engine.'
A Qantas jet suffered a similar incident in August when an engine on a flight to San Francisco exploded, causing debris to tear holes in the engine cover.
Investigators with the Australian Transport Safety Bureau found the engine's turbine blades had either fractured or broken away. The cause of that explosion in the Boeing 747's Rolls Royce RB211 engine is still under investigation.
Qantas denied there had been an explosion today and said the plane landed safely with no injuries.
The distinctive double-decker Airbus costs £156m and came into service in September 2007.Qantas have been using them since 2008.
The flight is a regular service that flies between Sydney, Singapore and London and is usually flown by a superjumbo. Qantas' A380s can carry up to 525 people.
A Qantas statement said the Airbus 380 plane experienced an 'engine issue' soon after taking off from Singapore for Sydney. It made a safe emergency landing in Singapore at 11:45am local time with 433 passengers and 26 crew on board, the statement said.
'Some media reports suggested the aircraft had crashed. These reports are incorrect. No Qantas aircraft has crashed,' it said.
Qantas chief executive officer Alan Joyce said the airline is now suspending all flights of its six Airbus A380 jetliners.
Qantas crew members leave the Changi air terminal in Singapore after making the emergency landing
Mr Joyce told a news conference in Sydney: 'We will suspend those A380 services until we are completely confident that Qantas safety requirements have been met.'
There are currently 37 of the A380 aircraft in operation around the world.
Singapore Airlines has 11 of the superjumbos, Emirates 13, Qantas six, Air France four and German carrier Lufthansa three.
British Airways and Virgin Atlantic are among a number of carriers who have placed orders for A380s. In all, Toulouse-based Airbus has 234 orders from 17 countries for the superjumbo.
Qantas said it was arranging hotel rooms in Singapore for passengers and crew of the affected flight today.
'We are currently planning for an aircraft to depart for Singapore to bring passengers back to Sydney tomorrow morning,' a spokesman added.
Qantas A380s use Rolls-Royce RR.L Trent 900 engines. Shares in Rolls-Royce slumped 1.2 per cent in early-morning trading following the incident.
Emirates and Singapore Airlines said all its A380s would be operating as scheduled.
The Australian Licensed Aircraft Engineers Association said safety was a growing concern for engineers at Qantas as outsourcing of work continued.
'It's about time Qantas listened to the warning signs,' spokesman Steve Purvinas said.
'We know that the dramatic increase in the number of safety incidents involving Qantas jets coincides with an increase in the amount of work that is no longer carried out in-house.'
Mr Purvinas said Qantas had shut down every in-house engine workshop in Australia in the past 10 years, and was naive for believing the current number of maintenance engineers could maintain its growing fleet of A380s.
Emergency: Passengers emerge from the superjumbo in Singapore. They are now being offered counselling